If you're looking for the ones that are available on the basic dining plan, they are at Le Cellier, Chefs de France and Captain's Grill.
Be very cautious with these fixed price menus if you are not on the dining plan. At Le Cellier, if you order the same three courses with either of the two lowest priced entrees, it will actually cost you more to order them from the fixed price menu than it would to order the same three courses a la carte.